package com.example.onenetdht11;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

import com.example.onenetdht11.dao.UserDao2;
import com.example.onenetdht11.db.City;
import com.example.onenetdht11.db.County;
import com.example.onenetdht11.db.Province;
import com.example.onenetdht11.entity.User2;
import com.example.onenetdht11.util.Httputils;
import com.example.onenetdht11.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {

    private static final int LEVEL_PROVINCE = 0;
    private static final int LEVEL_CITY = 1;
    private static final int LEVEL_COUNTY = 2;
    private List<String> dataList = new ArrayList<>();
    private ArrayAdapter<String> adapter;
    private TextView titleText;
    private ImageView backButton;
    private ListView listView;
    private ProgressDialog progressDialog;
    FragmentManager fm;
    User2 user;
    UserDao2 userDao;
    /**
     * 省列表
     */
    private List<Province> provinceList;
    /**
     * 城市列表
     */
    private List<City> cityList;
    /**
     * 城镇列表
     */
    private List<County> countyList;
    /**
     * 当前等级
     */
    private int currentLevel;

    /**
     * 选中的省份
     */
    private Province selectedProvince;

    /**
     * 选中的城市
     */
    private City selectedCity;




    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_choose_area,container,false);
        titleText = (TextView)view.findViewById(R.id.title);
        backButton = (ImageView)view.findViewById(R.id.back);
        listView = (ListView)view.findViewById(R.id.listview);
        adapter = new ArrayAdapter<>(getContext(),android.R.layout.simple_list_item_1,dataList);
        listView.setAdapter(adapter);
        fm = getFragmentManager();
        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        queryProvinces();
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @RequiresApi(api = Build.VERSION_CODES.O)
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (currentLevel == LEVEL_PROVINCE){
//                    String provinceName = provinceList.get(position).getProvinceName();
//                    user.setProvince(provinceName);
                    selectedProvince = provinceList.get(position);
                    queryCities();
                }else if (currentLevel == LEVEL_CITY){
//                    String cityName = cityList.get(position).getCityName();
//                    user.setCity(cityName);
                    selectedCity = cityList.get(position);
                    queryCounties();
                }else if (currentLevel == LEVEL_COUNTY){
                    String countyName = countyList.get(position).getCountyName();
                    System.out.println(countyList.get(position));
                    if (getActivity() instanceof CityActivity){
                        user = (User2) getActivity().getIntent().getSerializableExtra("user");
                        userDao = new UserDao2(getContext());
                        MainActivity.intance.finish();
                        Intent intent = new Intent(getActivity(), MainActivity.class);
                        user.setCounty(countyName);
                        userDao.updateCityById(user);
                        intent.putExtra("countyName",countyName);
                        Bundle bundle = new Bundle();
                        bundle.putSerializable("user",user);
                        intent.putExtras(bundle);
                        startActivity(intent);
                        getActivity().finish();
                    }else {
                        getActivity();
                    }
                }
            }
        });

        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (currentLevel == LEVEL_COUNTY){
                    queryCities();
                }else if (currentLevel == LEVEL_CITY){
                    queryProvinces();
                }
            }
        });
    }

    /**
     * 查询所有的省，优先从数据库查询，如果没有查到再去服务器上查询
     */
    private void queryProvinces(){
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList = DataSupport.findAll(Province.class);
        if (provinceList.size()>0){
            dataList.clear();
            for (Province province:provinceList){
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        }else{
            String address = "http://guolin.tech/api/china";
            queryFromServer(address,"province");
        }
    }
    /**
     * 查询选中省内所有的市，优先从数据库查询，如果没有查询到再去服务器上查询。
     */
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList = DataSupport.where("provinceid = ?",
                String.valueOf(selectedProvince.getId())).find(City.class);
        if (cityList.size()>0){
            dataList.clear();
            for (City city:cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_CITY;
        }else {
            int provinceCode = selectedProvince.getProvinceCode();
            String address = "http://guolin.tech/api/china/"+provinceCode;
            queryFromServer(address,"city");
        }
    }

    /**
     * 查询选中市内所有的县，优先从数据库查询，如果没有查询到再去服务器上查询。
     */
    private void queryCounties() {
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid=?",
                String.valueOf(selectedCity.getId())).find(County.class);
        if (countyList.size() >0){
            dataList.clear();
            for (County county:countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        }else{
            int provinceCode = selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china/" + provinceCode + "/" + cityCode;
            queryFromServer(address,"county");
        }
    }

    /**
     * 根据传入的地址和类型从服务器上查询省市县数据
     * @param address
     * @param type
     */
    private void queryFromServer(String address, final String type) {
        showProgressDialog();
        Httputils.sendOkhttpRequest(address, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responceText = response.body().string();
                boolean result = false;
                if ("province".equals(type)){
                    result = Utility.handleProvinceResponce(responceText);
                }else if ("city".equals(type)){
                    result = Utility.handleCityResponce(responceText,selectedProvince.getId());
                }else if ("county".equals(type)){
                    result = Utility.handleCountyResponce(responceText,selectedCity.getId());
                }
                if(result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            switch (type) {
                                case "province":
                                    queryProvinces();
                                    break;
                                case "city":
                                    queryCities();
                                    break;
                                case "county":
                                    queryCounties();
                                    break;
                            }
                        }
                    });
                }
            }
        });
    }

    /**
     * 显示进度对话框
     */
    private void showProgressDialog() {
        if (progressDialog == null){
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }

    /**
     * 关闭进度对话框
     */
    private void closeProgressDialog(){
        if (progressDialog!=null){
            progressDialog.dismiss();
        }
    }
}